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| 西南地区撂荒地复耕的粮食增产潜力与碳减排策略 |
| Grain yield increase potential and carbon emission reduction strategies for abandoned cropland recultivation in southwest China |
| Received:May 27, 2025 |
| DOI：10.13254/j.jare.2025.0495 |
| 中文关键词: 撂荒地复耕;西南地区;粮食增产潜力;碳减排措施 |
| 英文关键词: abandoned cropland recultivation;southwest China;grain production potential;carbon emission reduction approach |
| 基金项目:中国农业科学院科技创新工程项目（CAAS-ZDRW202419）；中国农业科学院青年创新专项（Y2025QC10）；国家社会科学基金重点项目（24AZD023）；国家自然科学基金青年项目（72303223） |
| Author Name | Affiliation | E-mail | | XU Zhongyu | State Key Laboratory of Efficient Utilization of Arable Land in China/Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China | | | YIN Changbin | State Key Laboratory of Efficient Utilization of Arable Land in China/Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China | | | LI Fuduo | State Key Laboratory of Efficient Utilization of Arable Land in China/Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China | lifuduo@caas.cn |
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| 中文摘要: |
| 耕地撂荒造成耕地资源浪费，推进撂荒地复耕是提升粮食产能的有效手段之一。本研究以我国西南地区为研究对象，采用遥感解析、情景分析等方法，对撂荒地复耕的粮食增产潜力与碳排放进行评估。研究表明，西南撂荒地总面积约80.34万hm2，主要分布在云南中北部、贵州丘陵山区、甘肃南部等地区，其中适宜种植水稻、玉米、春作马铃薯、秋作马铃薯和冬小麦的面积分别为33.74万、39.06万、19.57万、49.09万hm2和25.66万hm2。复耕后，春作和秋作马铃薯增产潜力合计达288.56万t，约占我国马铃薯年产量的16.12%，水稻、玉米和小麦产能分别约246.86万、224.42万t和67.26万t。碳排放分析显示，复耕地种植水稻的碳排放总量最高，达1.77×109 kg CO2-eq，通过采取减排措施，可实现8.66×108 kg CO2-eq的碳排放量。因此，应因地制宜复耕适宜粮食作物，推广水稻干湿交替、缓释肥替代传统化肥等关键降碳减排技术，同时设计配套政策体系，推动粮食增产与碳减排目标协同实现。 |
| 英文摘要: |
| The abandonment of cropland leads to resource waste, recultivation of abandoned cropland stands as an effective measure to enhance grain production capacity. Focusing on southwest China, this study employed remote sensing analysis and scenario modeling to evaluate both grain yield potential and carbon emissions from abandoned cropland recultivation. The results showed that the total area of abandoned land in southwest China was approximately 8.03×105 hm2, mainly distributed in the Yunnan-Guizhou region and southern Gansu. Among these, the areas suitable for planting rice, maize, spring potato, autumn potato, and winter wheat were 3.374×105, 3.906×105, 1.957×105, 4.909 ×105, and 2.566 ×105 hm2, respectively. Recultivation could achieve significant production capacity and demonstrated significant production potential. The combined yield potential for spring and autumn potatoes reached 2.89×106 t, accounting for approximately 16.12% of China′ s total potato production. Production capacities for rice, maize, and wheat were projected at 2.47 ×106, 2.24 ×106, and 6.73 ×105 t, respectively. Carbon emission analysis revealed that rice cultivation generated the highest emissions（1.77 ×109 kg CO2-eq）. Implementing mitigation measures could reduce emissions by approximately 8.66×108 kg CO2-eq. Recultivation crop species should be selected based on local conditions, and key carbon-reduction technologies including alternate wetting-drying for rice and slow-release fertilizers should be simultaneously promoted. Establishing supportive policy systems may also be necessary to synergistically achieve grain production increase and carbon reduction targets. |
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